Flexible display device having protrusion pattern in data pads

ABSTRACT

A flexible display device is provided that includes a display panel having an active area including a plurality of pixels displaying an image and a non-active area surrounding the active area, first data pads disposed in the non-active area adjacent to the active area of the display panel and electrically connected with the plurality of pixels, pads disposed in a direction away from the first data pads and the active area, second data pads disposed between the first data pads and the pads, and a protrusion pattern located between the second data pads and the third data pads and disposed on an upper part of the insulating layer.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation of U.S. patent application Ser. No.17/029,515, filed on Sep. 23, 2020, which claims priority from KoreanPatent Application No. 10-2019-0154491, filed on Nov. 27, 2019, whichare hereby incorporated by reference in their entirety.

BACKGROUND Field of the Disclosure

The present disclosure relates to a flexible display device, and moreparticularly, to a flexible display device in which durability of a datapad portion disposed in a non-display area is improved.

Description of the Background

Various display devices used for multimedia devices, such astelevisions, cellular phones, tablet computers, navigation units, orgame machines, are currently being developed. Such a display deviceincludes a display module, and the display module includes a displaypanel and a drive circuit. The drive circuit is configured to supply adata signal to the display panel.

When the drive circuit is mounted on the display panel, predeterminedheat and pressure are applied. In this process, a part of the displaypanel is bent so that the display panel is brought into contact with theends of the drive circuit rather than input/output bumps of the drivecircuit. Therefore, short circuits may occur. As a result, the displaydevice may have defects.

SUMMARY

Accordingly, the present disclosure is to suppress defects of a displaydevice caused by short circuits between a display panel and the ends ofa drive circuit when the display panel is bent.

The present disclosure is not limited to the above-mentioned feature orfeatures that are not mentioned above, can be clearly understood bythose skilled in the art from the following descriptions.

According to an aspect of the present disclosure, a flexible displaydevice includes: a display panel having an active area including aplurality of pixels displaying an image and a non-active areasurrounding the active area. The flexible display device also includesfirst data pads disposed in the non-active area adjacent to the activearea of the display panel and electrically connected with the pluralityof pixels. Further, the flexible display device includes pads disposedin a direction away from the first data pads and the active area andsecond data pads which are disposed between the first data pads and thepads.

The second data pads and the pads are connected with each other throughconnection lines, respectively. An insulating layer may be disposed tocover an upper part of the display panel and a part of the first datapads, the second data pads and the pads. The flexible display device mayinclude a protrusion pattern located between the second data pads andthe pads and disposed on the upper part of the insulating layer.

Other detailed matters of the exemplary aspects are included in thedetailed description and the drawings.

According to the present disclosure, even when the display panel isbent, it is possible to suppress short circuits between the displaypanel and the ends of a drive circuit.

Accordingly, no short circuit occurs between display panel and the endsof the drive circuit, thereby suppressing the flow of an overcurrent inthe display panel.

Also, according to the present disclosure, it is possible to suppressthe degradation of display quality caused by the flow of an overcurrentin the display panel. Therefore, the durability of the display devicecan be improved.

The effects according to the present disclosure are not limited to thecontents exemplified above, and more various effects are included in thepresent specification.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features and other advantages of thepresent disclosure will be more clearly understood from the followingdetailed description taken in conjunction with the accompanyingdrawings, in which:

FIG. 1 is an exploded perspective view schematically illustrating aflexible display device according to an exemplary aspect of the presentdisclosure;

FIG. 2 is a plan view schematically illustrating a display moduleaccording to an exemplary aspect of the present disclosure;

FIG. 3 schematically illustrates an equivalent circuit of a pixelaccording to an exemplary aspect of the present disclosure;

FIG. 4 is a cross-sectional view as taken along line I-I′ of FIG. 2 ;

FIG. 5A is a cross-sectional view as taken along line II-IF of FIG. 2 ;and

FIG. 5B is a plan view schematically illustrating area C of FIG. 2 .

DETAILED DESCRIPTION

Advantages and characteristics of the present disclosure and a method ofachieving the advantages and characteristics will be clear by referringto exemplary aspects described below in detail together with theaccompanying drawings. However, the present disclosure is not limited tothe exemplary aspects disclosed herein but will be implemented invarious forms. The exemplary aspects are provided by way of example onlyso that those skilled in the art can fully understand the disclosures ofthe present disclosure and the scope of the present disclosure.Therefore, the present disclosure will be defined only by the scope ofthe appended claims.

The shapes, sizes, ratios, angles, numbers, and the like illustrated inthe accompanying drawings for describing the exemplary aspects of thepresent disclosure are merely examples, and the present disclosure isnot limited thereto. Like reference numerals generally denote likeelements throughout the specification. Further, in the followingdescription of the present disclosure, a detailed explanation of knownrelated technologies may be omitted to avoid unnecessarily obscuring thesubject matter of the present disclosure. The terms such as “including,”“having,” and “consist of” used herein are generally intended to allowother components to be added unless the terms are used with the term“only”. Any references to singular may include plural unless expresslystated otherwise.

Components are interpreted to include an ordinary error range even ifnot expressly stated.

When the position relation between two parts is described using theterms such as “on”, “above”, “below”, and “next”, one or more parts maybe positioned between the two parts unless the terms are used with theterm “immediately” or “directly”.

When an element or layer is disposed “on” another element or layer,another layer or another element may be interposed directly on the otherelement or therebetween.

Although the terms “first”, “second”, and the like are used fordescribing various components, these components are not confined bythese terms. These terms are merely used for distinguishing onecomponent from the other components. Therefore, a first component to bementioned below may be a second component in a technical concept of thepresent disclosure.

Like reference numerals generally denote like elements throughout thespecification.

A size and a thickness of each component illustrated in the drawing areillustrated for convenience of description, and the present disclosureis not limited to the size and the thickness of the componentillustrated.

The features of various aspects of the present disclosure can bepartially or entirely adhered to or combined with each other and can beinterlocked and operated in technically various ways, and the aspectscan be carried out independently of or in association with each other.

Hereinafter, exemplary aspects of the present disclosure will bedescribed in detail with reference to accompanying drawings.

FIG. 1 is an exploded perspective view illustrating a flexible displaydevice according to an exemplary aspect of the present disclosure. FIG.2 is a plan view illustrating a display module DM.

Referring to FIG. 1 , a display device DD may include a window memberWM, a display module DM and a set member ST.

The window member WM may be divided into a transmission area TA and abezel area BZA.

The transmission area TA may transmit light incident thereto.Specifically, an image IM generated by the display module DM may bevisible to a user through the transmission area TA.

The bezel area BZA may be adjacent to the transmission area TA.Specifically, the bezel area BZA may surround the transmission area TA.In an exemplary aspect of the present disclosure, the bezel area BZA mayhave a predetermined color. The bezel area BZA may overlap a non-displayarea N/A.

The display module DM may be disposed under the window member WM. Thedisplay module DM can be protected by the window member WM against anexternal impact or the like.

The display module DM may be divided into an active area A/A and thenon-active area N/A. The active area A/A corresponds to the transmissionarea TA of FIG. 1 and may display the image IM and sense the user'stouch thereon.

The non-active area N/A corresponds to the bezel area BZA. In thenon-active area N/A, wiring lines for supplying electrical signals tothe active area A/A or receiving electrical signals from the active areaA/A may be disposed.

The display module DM may include a display panel DP, an input sensingcircuit, a drive circuit DIC, a printed circuit board PCB, an inputsensing drive circuit TIC and a control circuit CIC.

The display panel DP may include a plurality of pixels PX, a pluralityof data pads PD-D and a plurality of pads PD.

The pixels PX may be disposed overlapping the active area A/A. The datapads PD-D and the pads PD may be disposed overlapping the non-activearea N/A.

The data pads PD-D may include a plurality of first data pads PD-D1 anda plurality of second data pads PD-D2. In an exemplary aspect of thepresent disclosure, the number of the first data pads PD-D1 may begreater than that of the second data pads PD-D2.

The first data pads PD-D1 may be disposed in a first direction DR1. Inan exemplary aspect of the present disclosure, the first data pads PD-D1may be disposed in a matrix form. FIG. 2 illustrates an example wherethe first data pads PD-D1 are disposed in three rows, but the presentdisclosure is not limited thereto.

The second data pads PD-D2 may be disposed in the first direction DR1.The first data pads PD-D1 and the second data pads PD-D2 may be disposedapart from each other in a second direction DR2.

The first data pads PD-D1 may be electrically connected with the pixelsPX. The first data pads PD-D1 and the second data pads PD-D2 may beelectrically connected with the drive circuit DIC.

The pads PD may include a plurality of first pads PD1 and a plurality ofsecond pads PD2.

The first pads PD1 may transmit electrical signals to the pixels PXthrough the drive circuit DIC.

The second pads PD2 may be electrically connected with the input sensingcircuit.

The input sensing circuit may be disposed on the display panel DP.

The input sensing circuit may include a plurality of first sensorelectrodes and a plurality of second sensor electrodes.

Each of the first sensor electrodes and the second sensor electrodes maycontain a metal material. For example, each of the first sensorelectrodes and the second sensor electrodes may contain indium tinoxide, indium zinc oxide, indium gallium zinc oxide, or zinc oxide(ZnO), but is not limited thereto. Each of the first sensor electrodesand the second sensor electrodes may contain molybdenum (Mo) or copper(Cu).

An electrostatic capacitance may be generated between the first sensorelectrodes and the second sensor electrodes. When a user touches theactive area A/A, the electrostatic capacitance between the first sensorelectrodes and the second sensor electrodes may be changed. The inputsensing drive circuit TIC may sense a change in the electrostaticcapacitance between the first sensor electrodes and the second sensorelectrodes to determine which portion of the active area A/A has beentouched by the user.

The drive circuit DIC may be disposed overlapping the data pads PD-D.The drive circuit DIC may be electrically connected with the pixels PXin the active area A/A and may supply data signals to the pixels PX.

The printed circuit board PCB may be electrically connected with thepads PD. The input sensing drive circuit TIC and the control circuit CICmay be mounted on the printed circuit board PCB.

The input sensing drive circuit TIC may sense a change in theelectrostatic capacitance between the first sensor electrodes and thesecond sensor electrodes by means of the second pads PD2. Thus, theinput sensing drive circuit TIC may sense the user's touch applied tothe active area A/A.

The control circuit CIC may be configured to control at least any one ofthe drive circuit DIC and the input sensing drive circuit TIC.

In an exemplary aspect of the present disclosure, a part (i.e., abending area BA) of the display module DM may be bent. Thus, thenon-display area N/A of the display device DD may be reduced.

At least a part of the set member ST may be disposed under the displaymodule DM. The set member ST may accommodate the window member WM andthe display module DM.

FIG. 3 illustrates an example of an equivalent circuit of a pixel PXaccording to an exemplary aspect of the present disclosure.

Each pixel PX includes transistors TR1 and TR2, a capacitor CP and alight emitting element LD. In the present exemplary aspect, a pixel PXincluding two transistors TR1 and TR2 and one capacitor CP is describedas an example, but the configuration of the pixel PX is not limitedthereto.

An anode electrode of the light emitting element LD receives a firstpower voltage ELVDD applied to a power line PL through a secondtransistor TR2. A cathode electrode of the light emitting element LDreceives a second power voltage ELVSS. A first transistor TR1 outputs adata signal applied to a data line DL in response to a scan signalapplied to a scan line SL. The capacitor CP is charged with a voltagecorresponding to the data signal received from the first transistor TR1.The second transistor TR2 controls a current flowing in the lightemitting element LD according to the voltage stored in the capacitor CP.

FIG. 4 illustrates a part of a cross-sectional view as taken along lineI-I′ of FIG. 2 .

The display panel DP may include a base layer BL, a circuit layer CL, alight emitting element layer ELL and an encapsulation layer ENP.

The base layer BL may contain synthetic resins. Specifically, the baselayer BL may contain polyimide (PI), but is not limited thereto.

The base layer BL may include a first surface SF1 and a second surfaceSF2. The first surface SF1 may face the second surface SF2. The firstsurface SF1 may be disposed closer to the transistors TR1 and TR2 thanthe second surface SF2.

The circuit layer CL is disposed on the base layer BL. The circuit layerCL may include the transistors TR1 and TR2, the capacitor CP, aplurality of lines SL, DL and PL electrically connected with thetransistors TR1 and TR2, a buffer layer BFL, a gate insulating layer GI,an interlayer insulating layer ILD and a via layer VIA.

Each of the transistors TR1 and TR2 may include an activation patternACP, a control electrode GE, an input electrode SE and an outputelectrode DE.

The activation pattern ACP may contain polysilicon, amorphous silicon ormetal oxide semiconductor, but is not limited thereto. The controlelectrode GE may contain molybdenum (Mo), but is not limited thereto.Each of the input electrode SE and the output electrode DE may containat least any one of aluminum (Al) and titanium (Ti), but is not limitedthereto. In an exemplary aspect of the present disclosure, each of theinput electrode SE and the output electrode DE may have a structure inwhich titanium (Ti), aluminum (Al) and titanium (Ti) are sequentiallylaminated.

The buffer layer BFL may be disposed on the base layer BL. The bufferlayer BFL may suppress the diffusion of impurities present in the baselayer BL to the pixel PX. Particularly, the buffer layer BFL suppressesthe diffusion of the impurities to the activation pattern ACP of thetransistors TR1 and TR2 included in the pixel PX.

The impurities may be introduced from the outside or generated bythermal decomposition of the base layer BL. The impurities may be sodiumor gas discharged from the base layer BL. Further, the buffer layer BFLmay block moisture from being introduced into the pixel PX from theoutside.

The gate insulating layer GI may be disposed on the buffer layer BFL andmay cover the activation pattern ACP.

The interlayer insulating layer ILD may be disposed on the gateinsulating layer GI and may cover the control electrode GE.

The via layer VIA may be disposed on the interlayer insulating layer ILDand may cover the input electrode SE and the output electrode DE.

In an exemplary aspect of the present disclosure, each of the gateinsulating layer GI and the interlayer insulating layer ILD may containsilicon nitride or silicon oxide.

In an exemplary aspect of the present disclosure, the via layer VIA maycontain an organic material and/or an inorganic material.

The light emitting element layer ELL may include the light emittingelement LD and a pixel definition layer PDL. The light emitting elementLD may include an anode electrode AE, an emission layer EML and acathode electrode CE.

The anode electrode AE may be disposed on the via layer VIA. The anodeelectrode AE may be electrically connected with the output electrode DEthrough a contact hole.

The pixel definition layer PDL may be disposed on the via layer VIA andmay expose at least a part of the anode electrode AE. The pixeldefinition layer PDL may contain an organic material and/or an inorganicmaterial.

The emission layer EML may be disposed on the anode electrode AE.

If the light emitting element LD is an organic light emitting diode(OLED), the emission layer EML may contain an organic material. Inanother exemplary aspect of the present disclosure, if the lightemitting element LD is a micro LED, the emission layer EML may containan inorganic material.

The cathode electrode CE may be disposed on the emission layer EML.

The encapsulation layer ENP may include a first inorganic layer CVD1, anorganic layer MN and a second inorganic layer CVD2. FIG. 5 illustratesan example where the encapsulation layer ENP includes two inorganiclayers and one organic layer, but is not limited thereto. For example,the encapsulation layer ENP may include three inorganic layers and twoorganic layers, and in this case, the inorganic layers and the organiclayers may be alternately laminated.

FIG. 5A is a cross-sectional view as taken along line II-II′ of FIG. 2 ,and FIG. 5B is an enlarged plan view schematically illustrating area Cof FIG. 2 .

A flexible display device may include the display panel DP having theactive area A/A including a plurality of pixels PX displaying an imageand the non-active area N/A surrounding the active area A/A. Theflexible display device may also include the first data pads PD-D1disposed in the non-active area N/A adjacent to the active area A/A ofthe display panel DP and electrically connected with the plurality ofpixels PX. The flexible display device may further include the pads PDdisposed in a direction away from the first data pads PD-D1 and theactive area A/A and the second data pads PD-D2 between the first datapads PD-D1 and the pads PD.

The second data pads PD-D2 and the pads PD are connected with each otherthrough connection lines CL, respectively.

An insulating layer PLN may be disposed to cover an upper part of thedisplay panel DP and a part of the first data pads PD-D1, the seconddata pads PD-D2 and the pads PD. The flexible display device may includea protrusion pattern SPC located between the second data pads PD-D2 andthe pads PD and disposed on the upper part of the insulating layer PLN.

The printed circuit board PCB configured to transmit image data to thedisplay panel DP may be electrically connected with the pads PD.

The flexible display device may further include the drive circuit DICconfigured to generate a data signal using the image data transmittedfrom the printed circuit board PCB and output the generated data signalto the display panel DP. The flexible display device may also includeinput bumps D3 connected with the drive circuit DIC and configured toreceive the image data and output bumps OB connected with the drivecircuit DIC and configured to output the image data to the display panelDP. The output bumps OB may be electrically connected with the firstdata pads PD-D1, respectively, and the input bumps D3 may beelectrically connected with the second data pads PD-D2, respectively.

The protrusion pattern SPC may be disposed overlapping the ends of thedrive circuit DIC in a direction toward the input bumps D3. Theprotrusion pattern SPC may be the same layer as the pixel definitionlayer PDL illustrated in FIG. 4 . The protrusion pattern SPC may bedisposed on the upper part of the insulating layer PLN and in directcontact with the insulating layer PLN.

As described above, when the drive circuit DIC is mounted on the displaypanel DP, an adhesive member ACF is interposed between the drive circuitDIC and the display panel DP and heat and pressure are applied thereto.In this process, the display panel DP is bent and a space between theend on one side of the drive circuit DIC and the display panel DPbecomes narrow. In the narrow space, conductive balls CB contained inthe adhesive member ACF are aggregated and the insulating layer PLN ofthe display panel DP is broken. Thus, short circuits occur in the drivecircuit DIC and the connection lines CL under the insulating layer. Asdescribed above, bending of the panel occurs at one end of the drivecircuit DIC closer to the end of the display panel DP among both ends ofthe drive circuit DIC.

The protrusion pattern SPC may suppress the aggregation of theconductive balls CB when the display panel DP is bent and the distancefrom the drive circuit DIC becomes narrow. Also, even if the conductiveballs CB are aggregated, the protrusion pattern SPC can suppress thepenetration of the conductive balls CB through the insulating layer PLN.To this end, the protrusion pattern SPC may be formed of the insulatinglayer PLN and may contain an organic material and/or an inorganicmaterial. The height of the protrusion pattern SPC is formed lower thanthose of the input bumps D3. This is to suppress the interference of theprotrusion pattern SPC when the drive circuit DIC is bonded to thedisplay panel.

The protrusion pattern SPC may have a bar shape extended in a long-sidedirection of the drive circuit DIC and connected as one body, but is notlimited thereto. The protrusion pattern SPC may be formed into aplurality of bars apart from each other.

In another exemplary aspect of the present disclosure, a flexibledisplay device may include the display panel DP having the active areaA/A including a plurality of pixels PX displaying an image and thenon-active area N/A surrounding the active area A/A. The flexibledisplay device may also include the printed circuit board PCB configuredto transmit image data to the display panel DP. The flexible displaydevice may further include the drive circuit DIC configured to generatea data signal using the image data transmitted from the printed circuitboard PCB and output the generated data signal to the display panel DP.

In the drive circuit DIC, the input bumps D3 may be disposed to receivethe image data and the output bumps OB may be disposed to output theimage data to the display panel DP. The flexible display device may alsoinclude the first data pads PD-D1 disposed in the non-active area N/Aadjacent to the display area of the display panel DP and electricallyconnected with the output bumps OB. The pads PD may be disposed underand electrically connected with the printed circuit board PCB. Thesecond data pads PD-D2 may be located between the first data pads PD-D1and the pads PD and electrically connected with the input bumps D3connected to a drive circuit. The second data pads PD-D2 and the pads PDare connected with each other through the connection lines CL,respectively.

The insulating layer PLN may expose upper surfaces of the first datapads PD-D1, the second data pads PD-D2 and the pads PD and cover anupper part of the connection lines CL. The insulating layer PLN may havevarious forms. For example, the insulating layer PLN may be formed as anorganic insulating film of benzocyclobutene (BCB) or acryl or aninorganic insulating film such as a silicon nitride film (SiNx) or asilicon oxide film (SiOx). Otherwise, the insulating layer PLN may havea single-layered structure or a double-layered or multi-layeredstructure. The insulating layer PLN may be the same layer as the vialayer VIA illustrated in FIG. 4 . That is, the insulating layer PLN maycontain an organic material and/or an inorganic material.

The adhesive member ACF may be interposed between the drive circuit DICand the display panel DP to connect the input bumps D3 with the seconddata pads PD-D2 and the output bumps OB with the first data pads PD-D1.The adhesive member ACF may contain the conductive balls CB.

The flexible display device may further include the protrusion patternSPC. This is to suppress short circuits between the ends of the drivecircuit DIC in a direction toward the input bumps D3 and the connectionlines CL connecting the second data pads PD-D2 and the pads PD whenpressure is applied to bond the drive circuit DIC to the display panelDP. The protrusion pattern SPC may suppress the aggregation of theconductive balls CB at the ends of the drive circuit DIC when pressureis applied to bond the drive circuit DIC to the display panel DP. Sincethe conductive balls CB are not aggregated, the ends of the drivecircuit DIC are not in contact with the connection lines CL. Thus, it ispossible to suppress short circuits. Even if the conductive balls CB areaggregated at the ends of the drive circuit DIC, the conductive balls CBcannot penetrate through the insulating layer PLN due to the thicknessof the protrusion pattern SPC. Therefore, short circuits do not occurbetween the ends of the drive circuit DIC and the connection lines CL.

The protrusion pattern SPC may be the same layer as the pixel definitionlayer PDL illustrated in FIG. 4 . That is, the protrusion pattern SPCmay contain an organic material and/or an inorganic material. Theprotrusion pattern SPC may be disposed on the upper part of theinsulating layer PLN and in direct contact with the insulating layerPLN. The height of the protrusion pattern SPC is formed lower than thoseof the input bumps D3. This is to suppress the interference of theprotrusion pattern SPC when the drive circuit DIC is bonded to thedisplay panel.

The protrusion pattern SPC may have a bar shape extended in a long-sidedirection of the drive circuit DIC and connected as one body, but is notlimited thereto. The protrusion pattern SPC may be formed into aplurality of bars apart from each other.

The flexible display device according to an exemplary aspect of thepresent disclosure includes a protrusion pattern on an upper part of aninsulating layer on a display panel so as to overlap the ends of a drivecircuit. Therefore, even when the display panel is bent, it is possibleto suppress short circuits between the display panel and the ends of thedrive circuit.

Further, since no short circuit occurs between display panel and theends of the drive circuit, it is possible to suppress the flow of anovercurrent in the display panel. Also, it is possible to suppress thedegradation of display quality caused by the flow of an overcurrent inthe display panel. Therefore, the durability of the flexible displaydevice can be improved.

Although the exemplary aspects of the present disclosure have beendescribed in detail with reference to the accompanying drawings, thepresent disclosure is not limited thereto and may be embodied in manydifferent forms without departing from the technical concept of thepresent disclosure. Therefore, the exemplary aspects of the presentdisclosure are provided for illustrative purposes only but not intendedto limit the technical concept of the present disclosure. The scope ofthe technical concept of the present disclosure is not limited thereto.Therefore, it should be understood that the above-described exemplaryaspects are illustrative in all aspects and do not limit the presentdisclosure. The protective scope of the present disclosure should beconstrued based on the following claims, and all the technical conceptsin the equivalent scope thereof should be construed as falling withinthe scope of the present disclosure.

What is claimed is:
 1. A flexible display device, comprising: a singledisplay panel on a base layer, the display panel having an active areaincluding a plurality of pixels displaying an image and a non-activearea; first data pads disposed in the non-active area adjacent to theactive area of the display panel and electrically connected with theplurality of pixels; third data pads disposed in the non-active area ofthe display panel in a direction away from the first data pads and theactive area; second data pads disposed between the first data pads andthe third data pads; connection lines connecting the second data padsand the third data pads; an insulating layer disposed on the first datapads, the second data pads and the third data pads; a drive circuitdisposed to overlap the first data pads and the second data pads; aninput sensing circuit disposed on the base layer and electricallyconnected with the second data pads; and a bending area disposed betweenthe active area and the first data pads in the non-active area, thebending area disposed between the active area and the drive circuit. 2.The flexible display device according to claim 1, further comprising aprotrusion pattern located between the second data pads and the thirddata pads and disposed on an upper part of the insulating layer.
 3. Theflexible display device according to claim 2, wherein the protrusionpattern overlaps with end portions of the drive circuit.
 4. The flexibledisplay device according to claim 3, wherein the protrusion pattern hasa bar shape extended in a long-side direction of the drive circuit andconnected as one body.
 5. The flexible display device according to claim3, wherein the protrusion pattern has a bar shape extended in along-side direction of the drive circuit and having at least one cutportion.
 6. The flexible display device according to claim 2, whereinthe protrusion pattern is in direct contact with the insulating layer.7. The flexible display device according to claim 2, wherein theprotrusion pattern includes an organic material or an inorganicmaterial.
 8. The flexible display device according to claim 1, furthercomprising a window member disposed above the display panel andincluding a transmission area corresponding to the active area of thedisplay panel and a bezel area corresponding to the non-active area ofthe display panel.
 9. The flexible display device according to claim 8,wherein the bezel area is adjacent to the transmission area andsurrounds the transmission area.
 10. The flexible display deviceaccording to claim 8, wherein the bezel area has a predetermined color.11. The flexible display device according to claim 1, further comprisinga printed circuit board electrically connected with the third data padsand configured to transmit image data corresponding to the image to thedisplay panel.
 12. The flexible display device according to claim 11,wherein the drive circuit is configured to generate a data signal usingthe image data transmitted from the printed circuit board and output thegenerated data signal to the display panel.
 13. The flexible displaydevice according to claim 12, further comprising: input bumps connectedwith the drive circuit and configured to receive the image data; andoutput bumps connected with the drive circuit and configured to outputthe image data to the display panel.
 14. The flexible display deviceaccording to claim 13, wherein the output bumps are electricallyconnected with the first data pads, and the input bumps are electricallyconnected with the second data pads.
 15. The flexible display deviceaccording to claim 13, further comprising an adhesive member connectingthe input bumps with the second data pads and the output bumps with thefirst data pads, wherein the adhesive member contains conductive balls.16. The flexible display device according to claim 15, wherein theadhesive member is interposed between the drive circuit and the displaypanel.
 17. The flexible display device according to claim 15, wherein aprotrusion pattern suppresses aggregation of the conductive balls atends of the drive circuit when pressure is applied to bond the drivecircuit to the display panel.
 18. The flexible display device accordingto claim 15, wherein a protrusion pattern suppresses penetration of theconductive balls through the insulating layer when pressure is appliedto bond the drive circuit to the display panel.
 19. The flexible displaydevice according to claim 13, wherein a height of a protrusion patternis lower than those of the input bumps.
 20. The flexible display deviceaccording to claim 11, wherein the input sensing circuit includes aplurality of first sensor electrodes and a plurality of second sensorelectrodes, and wherein a change in an electrostatic capacitance betweenthe first sensor electrodes and the second sensor electrodes is sensedby an input sensing drive circuit disposed on the printed circuit board.21. The flexible display device according to claim 11, furthercomprising an input sensing drive circuit and a control circuit disposedon the printed circuit board, and wherein the input sensing circuitincludes a plurality of first sensor electrodes and a plurality ofsecond sensor electrodes, the input sensing drive circuit senses achange in an electrostatic capacitance between the first sensorelectrodes and the second sensor electrodes to determine which portionof the active area has been touched by a user, and the control circuitis configured to control at least any one of the drive circuit and theinput sensing drive circuit.
 22. The flexible display device accordingto claim 1, wherein each pixel includes a first transistor, a secondtransistor, a capacitor and a light emitting element, the firsttransistor outputs a data signal applied to a data line in response to ascan signal applied to a scan line, the second transistor controls acurrent flowing in the light emitting element according to a voltagestored in the capacitor, the capacitor is charged with a voltagecorresponding to the data signal received from the first transistor, ananode electrode of the light emitting element receives a first powervoltage applied to a power line through the second transistor, and acathode electrode of the light emitting element receives a second powervoltage.
 23. The flexible display device according to claim 22, whereinthe each of the first transistor and the second transistor include anactivation pattern, a control electrode, an input electrode and anoutput electrode.
 24. The flexible display device according to claim 23,wherein the input electrode and the output electrode have a structure inwhich titanium, aluminum and titanium are sequentially laminated. 25.The flexible display device according to claim 1, wherein the displaypanel includes the base layer, a circuit layer disposed on the baselayer, a light emitting element layer disposed on the circuit layer andan encapsulation layer disposed on the light emitting element layer.